Spin-Dependent Phenomena of Meta-optics

The rapid advancement of metasurfaces has revolutionized the field of photonics, offering unprecedented control over light manipulation at the nanoscale. Among various metasurface phenomena, spin-dependent effects have emerged as a particularly promising avenue for novel applications and functionalities. This review comprehensively examines spin-dependent phenomena in metasurfaces and their applications in advanced photonics. The fundamental principles that govern these phenomena, including the Pancharatnam-Berry and Rytov-Vladimirskii-Berry phases, are discussed based on the Jones matrix formalism. In addition, various metasurface-based applications, such as metalenses, holograms, and the spin Hall effect of light, are discussed, and recent advancements in both static and dynamically tunable designs are highlighted. Moreover, the potential use of spin-dependent metasurfaces in lasing, detection, and sensing is investigated with a focus on their adaptability. Overall, this review provides researchers with a comprehensive understanding of spin-dependent meta-optics by summarizing recent research and highlighting key trends. Thus, this establishes a strong foundation for further innovation in the rapidly advancing field of meta-optics.